// Main query processing method
public void ProcessQuery(QueryInfo query)
{
// Object where the data obtained after query execution is placed
// This object will be sent to the DB
AnswerInfo answer;
// Get a name of a symbol if it's CQGTimedBarsRequestClass object's request
// and show it in MiniMonitor form
if (query.ObjectType == "CQGTimedBarsRequestClass")
{
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
string instrName = (string)qObj.GetType().InvokeMember("Symbol",
BindingFlags.GetProperty, null, qObj, null);
if (!DCMiniMonitor.symbolsList.Contains(instrName))
{
DCMiniMonitor.symbolsList.Add(instrName);
Program.MiniMonitor.SymbolsListsUpdate();
}
}
// Handling of the request depending on its kind
switch (query.QueryType)
{
case QueryType.CallCtor:
{
try
{
string key;
// Handling of the ctor calling request and creation of an object depending on its type
switch (query.MemberName)
{
// Handling of CQGCEL ctor calling request
case "CQG.CQGCELClass":
key = CqgDataManagement.CEL_key;
break;
// Common case
default:
object[] args = Core.GetArgsIntoArrayFromTwoDicts(query.ArgKeys, query.ArgValues);
object qObj = CQGAssm.CreateInstance(query.MemberName, false,
BindingFlags.CreateInstance, null, args, null, null);
key = Core.CreateUniqueKey();
ServerDictionaries.PutObjectToTheDictionary(key, qObj);
UsedObjs.Add(key, qObj);
break;
}
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, valueKey: key);
PushAnswerAndDeleteQuery(answer);
}
catch
{
try
{
AutoGenQueryProcessing(query);
}
catch (Exception ex)
{
answer = CreateExceptionAnswer(ex, query);
PushAnswerAndDeleteQuery(answer);
}
}
}
break;
case QueryType.CallDtor:
{
if (query.ObjectKey != CqgDataManagement.CEL_key)
{
UsedObjs.Remove(query.ObjectKey);
ServerDictionaries.RemoveObjectFromTheDictionary(query.ObjectKey);
}
// Remove name of a symbol if it's CQG.CQGTimedBarsRequest object deleting
// from MiniMonitor form
if (query.MemberName == "CQG.CQGTimedBarsRequest")
{
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
string symbName = (string)qObj.GetType().InvokeMember("Symbol",
BindingFlags.GetProperty, null, qObj, null);
DCMiniMonitor.symbolsList.Remove(symbName);
Program.MiniMonitor.SymbolsListsUpdate();
}
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, value: true);
PushAnswerAndDeleteQuery(answer);
}
break;
case QueryType.GetProperty:
{
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
object[] args = Core.GetArgsIntoArrayFromTwoDicts(query.ArgKeys, query.ArgValues);
try
{
// Getting of property value
var propV = qObj.GetType().InvokeMember(query.MemberName, BindingFlags.GetProperty, null, qObj, args);
// Checking type of property value and returning value or value key
// (second, if it's not able to be transmitted through the database)
answer = Core.IsSerializableType(propV.GetType()) ?
CreateValAnswer(query.QueryKey, query.ObjectKey, query.MemberName, propV) :
CreateKeyAnswer(query.QueryKey, query.ObjectKey, query.MemberName, propV);
PushAnswerAndDeleteQuery(answer);
}
catch
{
try
{
AutoGenQueryProcessing(query);
}
catch (Exception ex)
{
answer = CreateExceptionAnswer(ex, query);
PushAnswerAndDeleteQuery(answer);
}
}
}
break;
case QueryType.SetProperty:
{
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
object[] args = Core.GetArgsIntoArrayFromTwoDicts(query.ArgKeys, query.ArgValues);
if (string.Concat(qObj.GetType()) == "CQG.CQGTimedBarsRequest" && query.MemberName == "Symbol")
{
DCMiniMonitor.symbolsList.Add(string.Concat(args[0]));
Program.MiniMonitor.SymbolsListsUpdate();
}
try
{
// Setting of property value
qObj.GetType().InvokeMember(query.MemberName, BindingFlags.SetProperty, null, qObj, args);
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, value: true);
PushAnswerAndDeleteQuery(answer);
}
catch
{
try
{
AutoGenQueryProcessing(query);
}
catch (Exception ex)
{
answer = CreateExceptionAnswer(ex, query);
PushAnswerAndDeleteQuery(answer);
}
}
}
break;
case QueryType.CallMethod:
{
// Handling of Shutdown method calling by CQGCEL object. This method has not be called from client applications
if (query.MemberName == "Shutdown")
{
var returnKey = "true";
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, valueKey: returnKey);
PushAnswerAndDeleteQuery(answer);
break;
}
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
object[] args = Core.GetArgsIntoArrayFromTwoDicts(query.ArgKeys, query.ArgValues);
try
{
object returnV;
bool isGetter = query.MemberName.StartsWith("get_");
bool isSetter = query.MemberName.StartsWith("set_");
if (isGetter || isSetter)
{
// Access property instead of calling method
string propName = query.MemberName.Substring(4);
BindingFlags invokeAttr = isGetter ? BindingFlags.GetProperty : BindingFlags.SetProperty;
returnV = qObj.GetType().InvokeMember(propName, invokeAttr, null, qObj, args);
}
else
{
returnV = qObj.GetType().InvokeMember(query.MemberName, BindingFlags.InvokeMethod, null, qObj, args);
}
if (!object.ReferenceEquals(returnV, null))
{
// Handling method call request depending of return value type
answer = Core.IsSerializableType(returnV.GetType()) ?
CreateValAnswer(query.QueryKey, query.ObjectKey, query.MemberName, returnV) :
CreateKeyAnswer(query.QueryKey, query.ObjectKey, query.MemberName, returnV);
}
else
{
// Handling void method call
var returnKey = "true";
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, valueKey: returnKey);
}
PushAnswerAndDeleteQuery(answer);
}
catch
{
try
{
AutoGenQueryProcessing(query);
}
catch (Exception ex)
{
answer = CreateExceptionAnswer(ex, query);
PushAnswerAndDeleteQuery(answer);
}
}
}
break;
case QueryType.SubscribeToEvent:
case QueryType.UnsubscribeFromEvent:
{
object qObj = UsedObjs.Contains(query.ObjectKey) ? UsedObjs[query.ObjectKey] : ServerDictionaries.GetObjectFromTheDictionary(query.ObjectKey);
try
{
System.Reflection.EventInfo ei = qObj.GetType().GetEvent(query.MemberName);
if (EventHandler.EventAppsSubscribersNum.ContainsKey(query.MemberName))
{
EventHandler.EventAppsSubscribersNum[query.MemberName] =
query.QueryType == QueryType.SubscribeToEvent ?
EventHandler.EventAppsSubscribersNum[query.MemberName] + 1 :
EventHandler.EventAppsSubscribersNum[query.MemberName] - 1;
}
else
{
EventHandler.EventAppsSubscribersNum.Add(query.MemberName, 1);
}
// Find corresponding CQG delegate
Type delType = FindDelegateType(CQGAssm, query.MemberName);
// Instantiate the delegate with our own handler
var eventHandlersMethods = typeof(CQGEventHandlers).GetMethods();
MethodInfo handlerInfo = null;
for (int i = 0; i < eventHandlersMethods.Length; i++)
{
if (eventHandlersMethods[i].Name.Contains(query.MemberName))
{
handlerInfo = eventHandlersMethods[i];
}
}
Delegate d = Delegate.CreateDelegate(delType, handlerInfo);
if (query.QueryType == QueryType.SubscribeToEvent)
{
// Subscribe our handler to CQG event
ei.AddEventHandler(qObj, d);
}
else if (query.QueryType == QueryType.UnsubscribeFromEvent)
{
// Unsubscribe our handler from CQG event
ei.RemoveEventHandler(qObj, d);
}
answer = new AnswerInfo(query.QueryKey, query.ObjectKey, query.MemberName, value: true);
PushAnswerAndDeleteQuery(answer);
}
catch
{
try
{
AutoGenQueryProcessing(query);
}
catch (Exception ex)
{
answer = CreateExceptionAnswer(ex, query);
PushAnswerAndDeleteQuery(answer);
}
}
if (query.QueryType == QueryType.SubscribeToEvent &&
query.MemberName == "DataConnectionStatusChanged")
{
// Fire this event explicitly, because data collector connects to real CQG beforehand and does not fire it anymore
CQGEventHandlers._ICQGCELEvents_DataConnectionStatusChangedEventHandlerImpl(CqgDataManagement.currConnStat);
}
}
break;
default:
{
throw new ArgumentOutOfRangeException();
}
}
}
private void m_CEL_CELDataConnectionChg(eConnectionStatus new_status)
{
StringBuilder connStatusString = new StringBuilder();
StringBuilder connStatusShortString = new StringBuilder();
Color connColor = Color.Red;
try
{
if (m_CEL.IsStarted)
{
connStatusString.Append("CQG API:");
connStatusString.Append(m_CEL.Environment.CELVersion);
connStatusShortString.Append("CQG:");
if (new_status != eConnectionStatus.csConnectionUp)
{
if (new_status == eConnectionStatus.csConnectionDelayed)
{
connColor = Color.BlanchedAlmond;
connStatusString.Append(" - CONNECTION IS DELAYED");
connStatusShortString.Append("DELAYED");
currConnStat = eConnectionStatus.csConnectionDelayed;
CQGEventHandlers._ICQGCELEvents_DataConnectionStatusChangedEventHandlerImpl(eConnectionStatus.csConnectionDelayed);
}
else
{
connStatusString.Append(" - CONNECTION IS DOWN");
connStatusShortString.Append("DOWN");
currConnStat = eConnectionStatus.csConnectionDown;
CQGEventHandlers._ICQGCELEvents_DataConnectionStatusChangedEventHandlerImpl(eConnectionStatus.csConnectionDelayed);
}
}
else
{
connColor = Color.LawnGreen;
connStatusString.Append(" - CONNECTION IS UP");
connStatusShortString.Append("UP");
currConnStat = eConnectionStatus.csConnectionUp;
CQGEventHandlers._ICQGCELEvents_DataConnectionStatusChangedEventHandlerImpl(eConnectionStatus.csConnectionUp);
}
}
else
{
connStatusString.Append("WAITING FOR API CONNECTION");
connStatusShortString.Append("WAITING");
}
if (mainForm != null)
{
mainForm.UpdateConnectionStatus(
connStatusString.ToString(), connColor);
}
}
catch (Exception ex)
{
TSErrorCatch.errorCatchOut(Convert.ToString(this), ex);
}
}